9887117 has 2 divisors, whose sum is σ = 9887118. Its totient is φ = 9887116.

The previous prime is 9887107. The next prime is 9887131. The reversal of 9887117 is 7117889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8844676 + 1042441 = 2974^2 + 1021^2 .

It is an emirp because it is prime and its reverse (7117889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9887117 - 2²⁰ = 8838541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9887107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943558 + 4943559.

It is an arithmetic number, because the mean of its divisors is an integer number (4943559).

Almost surely, 2^9887117 is an apocalyptic number.

It is an amenable number.

9887117 is a deficient number, since it is larger than the sum of its proper divisors (1).

9887117 is an equidigital number, since it uses as much as digits as its factorization.

9887117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 41.

The square root of 9887117 is about 3144.3786349611. The cubic root of 9887117 is about 214.6297358872.

The spelling of 9887117 in words is "nine million, eight hundred eighty-seven thousand, one hundred seventeen".